文章目录
一.常用参数注解使用
@RestController
public class HelloController {
@RequestMapping("/a.jpg")
public String hello(@RequestParam("username") String name){//请求参数username给name
// HttpSession session操作session
// Model model 放request域
// Person person 自定义类型请求对象
return "aaaaaa";
}
}
1. @PathVariable 路径变量
@PathVariable 路径变量
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import java.util.HashMap;
import java.util.Map;
@RestController
public class ParameterTestController {
@GetMapping("/car/{id}/owner/{username}")
public Map<String,Object> getCar(@PathVariable("id") Integer id,
@PathVariable("username") String name,
@PathVariable Map<String,String> pv
){
Map<String,Object> map=new HashMap<>();
map.put("id",id);
map.put("name",name);
map.put("pv",pv);
return map;
}
}
2.@RequestHeader 获取请求头
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RestController;
import java.util.HashMap;
import java.util.Map;
@RestController
public class ParameterTestController {
@GetMapping("/car/{id}/owner/{username}")
public Map<String,Object> getCar(@PathVariable("id") Integer id,
@PathVariable("username") String name,
@PathVariable Map<String,String> pv,
@RequestHeader("user-Agent") String userAgent,
@RequestHeader Map<String,String> header
){
Map<String,Object> map=new HashMap<>();
map.put("id",id);
map.put("name",name);
map.put("pv",pv);
map.put("user-Agent",userAgent);
map.put("headers",header);
return map;
}
}
3.@RequestParam 获取请求参数
（指问号后的参数，url?a=1&b=2）
@RestController
public class ParameterTestController {
@GetMapping("/car/{id}/owner/{username}")
public Map<String,Object> getCar(@PathVariable("id") Integer id,
@PathVariable("username") String name,
@PathVariable Map<String,String> pv,
@RequestHeader("user-Agent") String userAgent,
@RequestHeader Map<String,String> header,
@RequestParam("age") Integer age,
@RequestParam("interes") List<String> interes,
@RequestParam Map<String,String> params
){
Map<String,Object> map=new HashMap<>();
// map.put("id",id);
// map.put("name",name);
// map.put("pv",pv);
// map.put("user-Agent",userAgent);
// map.put("headers",header);
map.put("age",age);
map.put("interes",interes);
map.put("params",params);
return map;
}
}
4.@CookieValue 获取Cookie值
@RestController
public class ParameterTestController {
@GetMapping("/car/{id}/owner/{username}")
public Map<String,Object> getCar(@PathVariable("id") Integer id,
@PathVariable("username") String name,
@PathVariable Map<String,String> pv,
@RequestHeader("user-Agent") String userAgent,
@RequestHeader Map<String,String> header,
@RequestParam("age") Integer age,
@RequestParam("interes") List<String> interes,
@RequestParam Map<String,String> params,
@CookieValue("_ga") String _ga,
@CookieValue("_ga") Cookie cookie
){
Map<String,Object> map=new HashMap<>();
// map.put("id",id);
// map.put("name",name);
// map.put("pv",pv);
// map.put("user-Agent",userAgent);
// map.put("headers",header);
map.put("age",age);
map.put("interes",interes);
map.put("params",params);
map.put("_ga",_ga);
System.out.println(cookie.getName()+"===>"+cookie.getValue());
return map;
}
}
5.@RequestBody 获取请求体[POST]
@PostMapping("/save")
public Map postMethod(@RequestBody String content){
Map<String,Object> map = new HashMap<>();
map.put("content",content);
return map;
}
6.请求处理-@RequestAttribute
获取request域属性
@Controller
public class RequestController {
@GetMapping("/goto")
public String goToPage(HttpServletRequest request){
request.setAttribute("msg","成功了...");
request.setAttribute("code",200);
return "forward:/success"; //转发到 /success请求
}
@ResponseBody
@GetMapping("/success")
public Map success(@RequestAttribute(value = "msg",required = false) String msg,
@RequestAttribute(value = "code",required = false)Integer code,
HttpServletRequest request){
Object msg1 = request.getAttribute("msg");
Map<String,Object> map = new HashMap<>();
map.put("reqMethod_msg",msg1);
map.put("annotation_msg",msg);
return map;
}
}
7.@MatrixVariable与UrlPathHelper
/cars/sell;low=34;brand=byd,audi,yd 矩阵变量
例：cars/sell;low=33;brand=byd,bb.ik
url重写：/abc;jsessionid=xxxx 把cookie的值使用矩阵变量的方式进行传递
@GetMapping("/cars/{path}")
public Map carsSell(@MatrixVariable("low") Integer low,
@MatrixVariable("brand") List<String> brand,
@PathVariable("path") String path){
Map<String,Object> map = new HashMap<>();
map.put("low",low);
map.put("brand",brand);
map.put("path",path);
return map;
}
SpringBoot默认禁用矩阵变量
手动开启：对于路径的处理使用UrlPathHelper进行解析
removeSemicolonContent(移除分号内容)支持矩阵变量的
实现WebMvcConfigurer接口：
@Configuration(proxyBeanMethods = false)
public class WebConfig implements WebMvcConfigurer {
@Override
public void configurePathMatch(PathMatchConfigurer configurer) {
UrlPathHelper urlPathHelper = new UrlPathHelper();
// 不移除；后面的内容。矩阵变量功能就可以生效
urlPathHelper.setRemoveSemicolonContent(false);
configurer.setUrlPathHelper(urlPathHelper);
}
}
创建返回WebMvcConfigurerBean：
@Configuration(proxyBeanMethods = false)
public class WebConfig{
@Bean
public WebMvcConfigurer webMvcConfigurer(){
return new WebMvcConfigurer() {
@Override
public void configurePathMatch(PathMatchConfigurer configurer) {
UrlPathHelper urlPathHelper = new UrlPathHelper();
// 不移除；后面的内容。矩阵变量功能就可以生效
urlPathHelper.setRemoveSemicolonContent(false);
configurer.setUrlPathHelper(urlPathHelper);
}
}
}
}
@MatrixVariable的用例
// /boss/1;age=20/2;age=10
@GetMapping("/boss/{bossId}/{empId}")
public Map boss(@MatrixVariable(value = "age",pathVar = "bossId") Integer bossAge,
@MatrixVariable(value = "age",pathVar = "empId") Integer empAge){
Map<String,Object> map = new HashMap<>();
map.put("bossAge",bossAge);
map.put("empAge",empAge);
return map;
}